#region License, Terms and Conditions
//
// RAP.Framework.Libary.JSON - JSON and JSON-RPC for Microsoft .NET Framework and Mono
// Written by Atif Aziz (atif.aziz@skybow.com)
// Copyright (c) 2005 Atif Aziz. All rights reserved.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License as published by the Free
// Software Foundation; either version 2.1 of the License, or (at your option)
// any later version.
//
// This library is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
// details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this library; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
//
#endregion

namespace RAP.Framework.Libary.JSON.Conversion.Converters
{
  #region Imports

  using System;
  using System.ComponentModel;
  using System.Diagnostics;
  using CustomTypeDescriptor = Conversion.CustomTypeDescriptor;
  using System.Collections;

  #endregion

  public sealed class ComponentImporter : ImporterBase
  {
    private readonly PropertyDescriptorCollection _properties; // TODO: Review thread-safety of PropertyDescriptorCollection

    public ComponentImporter(Type type) :
        this(type, null)
    { }

    public ComponentImporter(Type type, ICustomTypeDescriptor typeDescriptor) :
        base(type)
    {
      if (typeDescriptor == null)
        typeDescriptor = new CustomTypeDescriptor(type);

      _properties = typeDescriptor.GetProperties();
    }

    protected override object ImportFromObject(ImportContext context, JsonReader reader)
    {
      Debug.Assert(context != null);
      Debug.Assert(reader != null);
      bool isIDictionary = false;

      reader.Read();

      object o = Activator.CreateInstance(OutputType);
      isIDictionary = (OutputType.GetInterface("IDictionary") != null);

      if (!isIDictionary)
      {
        while (reader.TokenClass != JsonTokenClass.EndObject)
        {
          string memberName = reader.ReadMember();

          CustomTypeDescriptor.TypeMemberDescriptor property
              = _properties.Find(memberName, true) as CustomTypeDescriptor.TypeMemberDescriptor;

          if (
              property != null &&
              !property.IsReadOnly &&
              property.JsonIgnoreType != JsonIgnoreType.NonImport
              )
          {
            object value;
            Type type;
            type = property.PropertyType;
            value = context.Import(type, reader);
            if (property.ArrayElementType != null)
            {
              JsonArray arr = value as JsonArray;
              if (arr != null)
              {
                value = arr.ToArray(property.ArrayElementType);
              }
            }
            try
            {
              property.SetValue(o, value);
            }
            catch { }
          }
          else
          {
            reader.Skip();
          }
        }
      }
      else
      {
        IDictionary dict;
        object value;

        dict = (IDictionary)o;
        while (reader.TokenClass != JsonTokenClass.EndObject)
        {
          string memberName = reader.ReadMember();
          value = context.Import(reader);
          dict[memberName] = value;
        }
      }

      return ReadReturning(reader, o);
    }
  }
}
